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Update br_ips to generate an empty patch when no hunks are found

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PikalaxALT
2019-10-26 10:41:31 -04:00
parent f10d7d01c5
commit a64503e744
1 changed files with 26 additions and 20 deletions
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tools/br_ips/br_ips.c
+26 -20
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@@ -255,25 +255,30 @@ static void writePatch(const char * filename, const hunk_t * hunks, size_t num,
// Maximum hunk size is 65535 bytes. For convenience, we allocate a // Maximum hunk size is 65535 bytes. For convenience, we allocate a
// round 65536 (0x10000). This has no effect on memory consumption, // round 65536 (0x10000). This has no effect on memory consumption,
// as malloc will round this up anyway. // as malloc will round this up anyway.
char * readbuf = malloc(0x10000); char * readbuf = NULL;
if (readbuf == NULL) FATAL_ERROR("failed to allocate write buffer\n"); if (rom != NULL) {
fwrite("PATCH", 1, 5, file); // magic readbuf = malloc(0x10000);
for (int i = 0; i < num; i++) { if (readbuf == NULL) FATAL_ERROR("failed to allocate write buffer\n");
// Encode the offset }
uint32_t offset = hunks[i].offset; fwrite("PATCH", 1, 5, file); // magic
putc(offset >> 16, file); if (readbuf != NULL) {
putc(offset >> 8, file); for (int i = 0; i < num; i++) {
putc(offset >> 0, file); // Encode the offset
// Encode the size uint32_t offset = hunks[i].offset;
size_t size = hunks[i].size; putc(offset >> 16, file);
putc(size >> 8, file); putc(offset >> 8, file);
putc(size >> 0, file); putc(offset >> 0, file);
// Yank the data straight from the ROM // Encode the size
if (fseek(rom, offset, SEEK_SET)) FATAL_ERROR("seek\n"); size_t size = hunks[i].size;
if (fread(readbuf, 1, size, rom) != size) FATAL_ERROR("read\n"); putc(size >> 8, file);
if (fwrite(readbuf, 1, size, file) != size) FATAL_ERROR("write\n"); putc(size >> 0, file);
// Yank the data straight from the ROM
if (fseek(rom, offset, SEEK_SET)) FATAL_ERROR("seek\n");
if (fread(readbuf, 1, size, rom) != size) FATAL_ERROR("read\n");
if (fwrite(readbuf, 1, size, file) != size) FATAL_ERROR("write\n");
}
free(readbuf);
} }
free(readbuf);
// Write the EOF magic // Write the EOF magic
fwrite("EOF", 1, 3, file); fwrite("EOF", 1, 3, file);
fclose(file); fclose(file);
@@ -307,14 +312,15 @@ int main(int argc, char ** argv) {
"If there are baserom.gba hunks in this project,\n" "If there are baserom.gba hunks in this project,\n"
"please ping PikalaxALT on the pret discord,\n" "please ping PikalaxALT on the pret discord,\n"
"channel #gen-3-help.\n"); "channel #gen-3-help.\n");
writePatch("baserom.ips", NULL, 0, NULL);
} else { } else {
// Merge neighboring hunks to reduce the number of hunks. // Merge neighboring hunks to reduce the number of hunks.
collapseIncbins(hunks, &num); collapseIncbins(hunks, &num);
// Encode the hunks in the IPS patch. // Encode the hunks in the IPS patch.
writePatch("baserom.ips", hunks, num, rom); writePatch("baserom.ips", hunks, num, rom);
// Communicate status to the user.
puts("IPS file created at baserom.ips\n");
} }
// Communicate status to the user.
puts("IPS file created at baserom.ips\n");
// Clean up and return. // Clean up and return.
fclose(rom); fclose(rom);
free(hunks); free(hunks);